Powder spraying device



May 30, 1933. w. H. RQSE 3,911,972

POWDER SPRAYING DEVICE Filed June 25, 1932 I IIIQQIJIIIIIIIIIIIIIflllllg INVENTOR '"m" fi ATToRNEY Patented May 30, 1933 UNITED STATES 1 WILLIAM H. ROSE, or JERSEY CIT NEW JE SEY rownnn srnAYING nnv icn Application filed June 25,

9 other, valuable properties, as will be seen upon a consideration of this application and its accompanying drawing.

Among the undesirable properties of the generally employed powder spraying devices are the high cost of construction, their hability to become dented rendering them inoperativeythe back suction 'ofthe powder into the air chamber, the clogging of valves preventing the proper operation of the device, the bending of plunger rods, imperfect abutment between the piston and the chamber side, the absence of proper central guidance for the plunger, incomplete exhaustion of the powder from the powder chamber and the ejection, of a more or less column of powder instead of a desirable sprayeflec't, nonejof which undesirable properties are possessed by the device of my invention.

.My device consists of two preferably hollow cardboard telescopic members, the length of the piston member being practically the length of the air pressure cylinder, thus insuring their constant proper alignm ent, this construction also allowing of a constant reservoir ofair sufiicient to supply the pressure'chamber; preferably a flap valve capable of allowing and preventing the, passage of air between the interior. of the piston and the air pressure thus insuring perfectgpiston movement airefi'ect; a normally ,closedvalve of a resilient tube construction connecting the air chamber with the powder chamber, thus preventing the back withdrawal of the powder into the air chamber, and a powderdeliveryspout pref erably having its; entrance area lessthan that ofits delivery. end to produce a spraylike efl ect tothe delivered powder. I The novelty and: advantageous. features ofjmy device willbe evident uponaconsid- 1932. Serial No. 619,251,;

eration: of the accompanying drawing' 'in whichsimilar parts are designatedby similar numerals.- w 'Figure- Lisa plan'view'of one form of the device of my invention. f Figure 2 is a'v'ertical cross-section' of the device of Figurel. Figure 3 is a section through the line'3-3' ofFigureQ. I Figure 4 is a section through the'line 4:-4: of Figure 2. 1 Figure 5 is a broken vertical section of a' modified form'of attaching the end cap.

Figure 6 is a broken vertical section of a modified form of/ attachment between the powder carrying member and its cap and a modified form of: the powder delivering spoutl; V Figure? isa broken vertical section of' a modified method of attaching the air delivery valve. v The particular form of the device of my invention shown in Figures 1' to 4 inclusive of the accompanying drawing comprise's'an inner cylindrical piston member 10 telescopically movable within the outer cylindrical membe 11. Fixedly attached to the. piston cylinder 10 and extending across the outer open end thereof is a metallic forami nous cover 12,'having a plurality ofopenings 13, 13 therein. Fixedly attached to the piston cylinderlO and extending across the inner open end thereof is=a metallicforaminous cover 14, having a plurality of openings 4 15, 15 therein. A handle 16, having the en- 85 larged portion 17 extends through a centrally positioned, opening in the cover 12 and abuts upon the. under face of the cover 14 and afscrew 18 passes throughthe washer 19, the sheet rubber valve member 20, the cover 14' and into the-handle 16. The valve member 20 isoi less diameter than the pis ton member 10. but ofsuflicient size to'cover allof the openings 15,'-15in the cover 14. 95 The enlarged portion- 17 of the handle-16 abuts upon 'theouter face of the cover 12; It Will thus be seen that the covers'12 and 14 are maintained in rigid position upon the handle 16-117 and in supported position due to any stress incident to the movement of the piston member within the member 11.

The member 11 is divided into a pressure chamber 21 and a powder containing chamber 22 by means of the transverse partition 23, which is fixedly attached to the walls of the memberl1 by means of glue, or otherwise. The partition 23 has an opening 24 around which is a circular recess 25 tubular rubber valve 26 is cemented, or glued, within the recess 25, andis so constructed that its free end is constricted into two abutting lips 27, 27, which normally close this end of the valve. 7.

The extended end of the member 11 has its periphery threaded at 28, in order that the metal cap 29 may be'attached thereto by means of its threaded flange 30. A metallic spout 31 passes through an opening in the cap 29 and is aflixed thereto, the opening in the inner extremity 32 of the spout 31 being of less area than that of the outside opening of the spout. r

The members and 11 may be constructed of any suitable material,'but I pre fer to have them made from suitable heavy cardboard,- as it is not so liable to become dented and hence rendered difficult of eflicient ope-ration, and because of its economic construction. The member l'l-can be covered with suitable paper or other attractive material. The. shape of the handle allows of a natural grip and is much more easily and comfortably operated than the ringshaped handle-grips usually present 'in devices of this character. A

The operation of the device is as follows :The cap 29 is removed, the powder placed within the chamber 22 and the cap 29 replaced. The handle 17 is gripped by the Operator andthe piston member 10 given a reciprocal movement within the member 11. The inward stroke of the piston mem ber 10 causes the valve 20 to close the openings 1 5,15 inthe c0verl4, thus forcing the air within the chamber 2lthrongh the valve 26, this air pressure opening the lips 27 ,27 of the valve allowing the airc'to; pass into the chamber 22 and forcingthe powder outwardly of the devicethrough the spout 31. As soon as the inward movement of the piston 10 is stopped, the lips 27, 27 of the valve close, preventing the'powder from being drawn'back into the chamber 21. The outward movement of the piston 10, causes air to pass inwardly through the openings 13,13 of the cover 12 andthrough the openings 15, of the (30"61 14, the valve allowing this air to pass into the chamber 21. The modified form shown in'Fi-gure 5, has a metalthreaded member 33, upon the outward circumferential rim of the member 11, up0n whichthe threaded flange of the cap 29 can be screwed. Y i a --,In the modified form shown in Figure 6,

the outer extremity of the member 11 carries a fixedly attached metallic U-shaped member 34, within which the metallic cap 35 is frictionally retained, and the spout consists of the rubber tube 36, with the restricted inner end 37, removably attached to the cap 35 b means of the -twoannular spaced meni ers 38",- 38.

In the modified form shown in Figure 7, a hollow tubular member 39 is fixedly attached within an opening in the partltion 23 and the rubber valve 26 is fixedly attached around the member 39 by means of glue, or otherwise 1 The operation of the devices containing the described modification is similar to that of the form shown in Figures 1 to 4.

The position of the closed end-27 of the air delivering valve 26 with respect to the inner end 32 of the spout, or powder dehv-. ering member 31 may be varied but I prefer to have them situated in'the' approximate position as shown, as experience has proved that a more complete and effective powder delivering is thus obtained.-

While the spout, or powder delivering member 31 may be of the same area throughout, I have found that a more spraylike effect of the powder is produced by having the inner opening area less than that of the outer opening end.

If cardboard isemployed in the production of the members, which may he of other than circular cros's-section, it may be of any desired thickness and -water-proofed, if necessary. I

It will thus be seen that my invention presents a practical and eiiicient powder spraying device, economic and simple 1n construction, easy of operation andnot l1- able to become inoperative.

I do not'liniit myself to the particular size, sha e, number or arrangementof parts, nor to tie particular materials shownand described, as these are given simply as a means for clearly des'cribing'thedevice of myinvention;

What I claim is:

1. In a device of the character described, a

in combination, an outer hollow compres-' sion member, open at one end and having a removable cover with an opening therethrough at the other end; a transverse partition having an opening therethrough dividing said compression member into an inner air chamber and an outer powder containing chamber;-a normally closed resilient valvemember carried by: said partition within said powder-containing "chant her and operative withsaid partition open-I ing; a tube extending outwardly from said powder-containing chamber through said cover opening; a holl0w .pist0n member reciprocally movable withinsaid outer compression member; an inner'foraminous end within said compression member and attached to the side wall of said piston; a normally closed resilient valve member carried by said inner piston end and operative with the openings therein; an outer foraminous end member outside said compression member and attached to the side wall of said piston; and a co-operating handle extending through said outer piston end wall and abutting upon said inner piston head wall, the movement of which will move said piston.

2. In a device of the character described, in combination, an outer hollow compression member, open at one end and having a removable cover with an opening therethrough at the other end; a transverse partition having an opening therethrough dividing said compression member into an inner air chamber and an outer powdercontaining chamber; a normally closed resilient valve member carried by said partition within said powder-containing chamber and operative with said partition opening; a tube extending outwardly from said powder-containing chamber through said cover opening; a hollow piston member reciprocally movable within said outer coman inner foraminous end pression member within said compression member and attached to the side wall of said piston; a normally closed resilient valve member carried by said inner piston end and operative with the openings therein; an outer foraminous end member outside said compression member and attached to the side wall of said piston; an operating handle extending through said piston end wall and said piston valve; means connecting said handle, said piston end wall andsaid piston valve and an enlarged portion of said handle exterior of the device and abutting upon the outer face of said outer piston end member.

3. In a device of the character described, in combination, an outer hollow compression member, open at one end and having a removable cover with an opening therethrough at the other end; a transverse par.- tition having an opening therethrough dividing said compression member into an in her air chamber and an outer powder-containing chamber, a normally closed resilient tubular valve member carried by said par.- tition within said powder-containing member and operative with said partition opening, a tube extending outwardly from said po\vder-containing chamber through said cover opening, the inner end of said tube being positioned further from said compression chamber cover than is the free end of said tubular valve, a piston reciprocally movable within said outer compression member, means adapted to prevent the admission of air into said air chamber during the inward movement of said piston and means adapted to admit air into said air chamber during the outward movement of said piston.

Signed at New York city in the county of New York and State of New York this 23rd day of June, 1932.

WILLIAM H. ROSE. 

